Valve-motion for duplex engines



5 Sheets-Sheep 1.

(fie Model.) i

O. G. WORTHINGTON.

VALVE MOTION FOR DUPLEX ENGINES. No. 455,555- Patented July 7, 1891.

5 Sheets-Sheet 2.

(No Model.)

- C. C. WORTHINGTON.

VALVE MOTION FOR DUPLEX ENGINES. No. 455,555. Patented July '7, '1891.

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(No Model.) 5 Sheets-Sheet 3.

G. G. WORTHINGTON. I VALVE MOTION FOR DUPLEX ENGINES.

No. 455,555." Patented July 7, 1891.

ygffeof v (No Model.) 5 Sheets-Sheet 4.

0. 0. WORTHINGTON. VALVE MOTION-FOR DUPLEX ENGINES. No. 455,555.Patented July 7,1891.

(No Model.) 5 SheetS -Sheet' s.

O. G. WORTHINGTON. VALVE MOTION FOR DUPLEX ENGINES.

No. 455,555. Patented July 7,1891.

UNITED STATES PATENT OFFICE.

"CHARLES o. 'woRTHINeToN,

OF IRVINGTON, NEW YORK.

VALVE-MOTION FOR DUPLEX ENGINE-S.

SPECIFICATION forming part of Letters Patent No. 455,555, dated July 7,1891. Application filed September 22, 1890- Serial No. 365,715- (Nomodel.)

To all whom, it may concern:

Be it known that I, CHARLES C. WORTH- INGTON, a citizen of the UnitedStates, residing at Irvington, county of Westchester and State of NewYork, have invented certain new and useful Improvements in Valve-Motions for Duplex Engines, fully described and represented in thefollowing specification and the accompanying drawings, forming a part ofthe same.

This invention relates to duplex engines, its object being to provide animproved valve movement in which fewer parts are exposed, and whichshall be simpler, cheaper, and require less oiling than valve-movementsheretofore in use.

In duplex engines as commonly constructed the cross-motion for operatingthe valve of one side of the engine from the other side has been placedoutside the steam-chest between the piston-rods and valvezrods, and onaccount of the necessity of reversing the movement of one of the valvesfrom that of its actuating piston-rod operating-levers of different formhave been required, involving the construction of several parts ofdifierent dimensions. The mechanism of the crossmotion also beingoutside the steam-chest, is

exposed to accident, and each moving part requires to be oiledseparately. In those constructions in which the cross-motion'has notbeen placed between the piston rods and valve-rods the operation of thevalve on one sideof the engine from the other side has beenattainedeither by cross-ports in the valve-chest or, where attained bymeans of mechanical cross-motion devices between the valve-rods andvalves, the valves or ports on one side of the engine have been arrangedto secure the reversal of the movement of one of the valves relativelyto its actuating piston-rod, necessitating the use of different forms ofvalves or different arrangements of steam-ports on the oppositesides ofthe engine. I avoid these objections and provide a construction in whicheach valve-rod is operated by its own piston, employingfewer parts andthese of simpler construction, andin which the cross-motion is placedinside the steam-chest, the moving parts of the crossmotion thus beingconstantly lubricated by' steam and oil from the ordinary steam-pipe ingthe same will now be given,reference being had to the accompanyingdrawings, forming a part of this specification, in which- Figure 1 is asectional plan of a duplex engine containing my invention. Fig. 2 is alongitudinal section taken through one of the the steam-cylinders. Fig.3 is a cross-section on the line 3 3 of Fig. 1. Fig. 4 is a sectionalplan of a duplex engine employing a tappet movement; and Fig. 5 is alongitudinal sectional elevation of the same, the section being takenthrough one of the steam-cylinders.

Referring now to said drawings, A B are a pair of steam-cylindersprovided with the usual induction and exhaust ports a b, theinduction-ports communicating with the steamchest O-an'd theexhaust-ports with the exhaust-pipes D E, controlled by the sliding D-valves F G, as is usual in this class of construction.

H I are the piston-rods of the respective cylinders and K L thecorresponding valverods, these valve-rods being operated from thepiston-rods on their own side of the engineby means of levers M N of thefirst class pivoted at c and engaging the respective piston-rods bymeans of the usual adjustable spools d, the levers and connections onopposite sides of the engine being identical in construction.

Inside the steam-chest G is adjustably secured to the valve-rod K, anarm 0 extending across the steam-chamber and engaging the slide-valve Gby means of lugs ethereon, a certain amount of lost motion being llowedthe arm 0 between the lugs; The va ve-rod L carries lugs f, engaging oneend of a lever P, mounted on a pivot g,'central to the valvechest, thislever P extending across the chest and engaging the slide-valve F bymeans of lugs it, carried thereby, lost motion being provided betweenthe lugs and lever, preferably at both ends of the latter, the lugs fbeing preferably made adjustable, as shown.

It will readily be understood that the movement of the piston-rods oneach side of the engine operates the valve-rods on the same side andthat valve-rod K near the end of one stroke moves the slide-valve G inthe same direction as the valve-rod and opposite to that of thepiston-rod II on the same side of the engine,and the valve-rod L nearthe.

end of its stroke moves the slide-valve F in a direction opposite tothat of the valve-rod and the same as that of the piston-rod I, thedirection of movement of the valve-rod and valve being reversed bymeansof the lever P.

a The construction shown in Figs. 4 and 5 is the same, except that thevalve-rods are operated by means of tappets R S, carried by thepiston-rods and engaging adjustable lugs 7s on the correspondingvalve-rods, lost motion being provided between the tappets and lugs. Inthis construction no lost motion need be provided inside the valvechest, the arm 0 and lever P being in constant or nearly constantengagement with their respective lugs.

The arrangement of the cross-motion with its plane of movement parallelor substantially parallel with the plane of movement of the valvereduces the vertical measurement of the engine, permitting thecross-motion to be placed Within the steam-chest without materiallyincreasing the size of the latter.

lVhile the construction shown and described forms a simple andconvenient arrangement of parts embodying my invention it will beunderstood that my invention is not to be limited to the specificconstruction shown, as various other devices for carrying out myinvention may readily'be provided by one skilled in the art.

WVhile I have shown and described my invention as applied to a simpleduplex engine it will be understood that it is equally applicable to compound-engines of this type.

What I claim is 1. In a duplex engine, the combination, with thesteam-cylinders on opposite sides of the engine, and their valves, ofvalve-rods operating the valves on the opposite side. of the engine fromthe valve-rods, the movement of one of the valves being reversedrelatively to the piston on the opposite side of the engine,substantially as described.

2. In a duplex engine, the combination, with the steam-cylinders onopposite sides of the engine, and their valves, of valve-rods operatingthe valves on the opposite side of the engine from the valve-rods andactuated from theirown side of the engine, the movement of one of thevalves being reversed relatively to the piston on the opposite side ofthe engine, substantially as described.

3. In a duplex engine, the combination, with the steam-cylinders onopposite sides of the engine, and their pistons and valves, ofvalve-rods operating the valves on the opposite side of the engine fromthe valve-rods and actuated by the piston-rods on their own side of theengine, the movement of one .of the valves being reversed relatively toits actuating piston-rod, substantially as described. I

4. In a duplex engine, the combination, with the steam-cylinders onopposite sides of the engine, and their pistons and valves, of valverods operated by the piston rods on their own sides of the engine, andcross-motion devices between the valve-rods and valves on opposite sidesof the engine, reversing the movement of one of the valves relatively toits actuating piston-rod, substantially as described.

5. In a duplex engine, the combination, with the steam-cylinders onopposite sides of the engine, and their valves, of cross-motion devicesinside the steam-chest operating the valves from the opposite side ofthe engine and reversing the movement of one of the valves,substantially as described.

6.- In a duplex engine, the combination, with the steam-cylinders onopposite sides of the engine, and their valves, of cross-motion devicesinside the steam-chest operating the valves from the opposite side ofthe engine and reversing the movement of one of the Valves, saidcross-motion devices being constructed with lost motion, substantiallyas described.

7. In a duplex engine, the combination,

with the steam-cylinders on opposite sides of the engine, and theirpistons and valves, ot valve-rods operated by the pistons on their ownsides and cross-motion devices inside the steam-chest operating thevalves from the valve-rods on the opposite side of the engine andreversing the movement of one of the valves, substantially as described.

8. In a duplex engine, the combination, with the steam-cylinders onopposite sides of theengine, and their pistons and valves, of valve-rodsoperated reversely by the pistons on their own sides of the engine andcrossmotion devices inside the steam-chest operating the valves from thevalve-rods on the opposite side of the-engine, the relative movement ofone of the valve-rods and its valves being reversed,'substantially asdescribed.

9. The combination, with the steam-cylinders on opposite sides of theengine, and their pistons and valves, of the valve-rods K L, operated bythe piston-rods on their own side of the engine, and arm 0 and lever P,operated by the respective valve-rods and operating the valves on theopposite side of the engine, substantially as described.

10. The combination,with the steam-cylinders on opposite sides of theengine, and their pistons and valves, of piston-rods H I, valverods K L,levers of the first class connecting the piston-rods and valve-rods'onthe same side of the engine, arm 0, operated by one of ICC IIO

the valve-rods and operating the va-ly e onthe operated by said arm andlever, substantially opposite side of the engine, and lever P, opasdescribed. 7

erated by the other valve-rod and operating In testimony whereof I havehereunto set the opposite valve, lost motion being promy hand in thepresence of two subscribing 5 vided between the piston-rods and valves,witnesses.

substantially as described.

11. The combination, with the two Valve- CHARLES WORTHINGTON' rods of aduplex engine, of the rigid arm 0, Vitnesses: moved by one valve-rod,and the pivoted lever B. W. PIERSON,

10 P, moved by the other Valve-rod, and valves LOUIS R. ALBERGER.

